What’s this please

[suzanne]

Hello my zebra danio went missing I think it was in a slim filter stuck for a day it’s back now but has this on its head can anyone help please

[suzanne]

[fr499y]

could be damaged skin from where it was stuck. Best thing to do is clean water and possibly some melafix? @plankton @Martinspuddle @black ghost

[suzanne]

Thanks can I put that in aquarium or isolate the one fish ?

[fr499y]

You can but if wait for one of them three to chime in as they know meds better than I do!

[Gingerlove05]

Melafix can be used in your aquarium without isolating. Its a very mild med which helps prevent secondary infections.
As @fr499y says extra water changes will help keep the water clean and follow the instructions. Just remember to take into account your decor etc (approx 20% of your tank volume) when dosing

[black ghost]

Can’t tell from those pics. Probably some loose skin or a scale or two hanging off?

[plankton]

Welcome to the forum.
Melafix will help if it is just damage.
The pics are unfocussed, so it is hard to tell if anything else is going on as well.
Melafix won't hurt anything in the tank, it just (really) helps with healing and preventing secondary infections, so you don't need to isolate.

[suzanne]

Thanks everyone ís impossible to get a good picture as you know they never keep still . I put some in tank last night,today it’s gone quite a lot .